Insulator



oct. 21, 1941.

C. J. LEMONT INSULATOR Filed April' l2, 1940.

l /l/ mi /m/ 41%,/

lNvEN-ron ATTORNEY.

.freely received operation between the screw element and the in- Patented Oct. 21, 1941 'APR 111944 OFFICE INsnLAron v.Clarence J.Lemont, South Milwaukee, Wis., as-

Application April 12, 19,40, Serial No. 329,211

(ci. iti-154) y 2 Claims. This invention relates to improvements in porcelain insulator screw brackets and method of assembly and forming of parts thereof.

My copending application SerialI No. 356,637 iiled September 13, 1940, is a division of the present application and is directed to the subject matter disclosed herein.

It is an object of this invention to provide an insulator screw bracket comprising an insulator element,v a unitary frame member adapted to receive the insulator element in fixed mounted position therewith, and a screw means operatively ,related with the frame member for mounting the bracket in operating position.

More particularly, it is an object to provide for an insulator screw bracket including a grooved insulator element, a unitary frame member comprising a cup-like base portion adapted to receive the lower part of the insulator element in embracing relationship'therewith, and a pair of arm-like extensions adapted to be received in locked engagement with' the through the insulator element.

Another object is to provide for an insulator screw bracket including a grooved insulator, a unitary frame member attached in reinforcing relationship to the insulator and provided with in the means, and to permit cosulator, thereby preventing the disengagement of the screw element from the screw receiving means.

Still another object is thereof and adapted to receive a lag screw. in a manner to permit threaded engagement oi' the screw with a comparatively thin support being I immediately adjacent the base portion, therebyproviding anchorage for the bracket and preventing splitting Voi' the thin to provide for an insu' lator screw bracket, a framemember having a. rigid recessed base portion apertured centrally support due to an unthreaded section on the-lag screw otherwise part of its structure an tend upwardly from the -walll of the prising a minimum number of operations which are simple, efficient and economical.

In the drawing:

Fig. 1 is a view in side elevation showing the elements of the bracket partially in sectional view.

Fig. 2- is a vertical'view taken at right angles relative t0 Fig. 1.

.Fig. 3 is a perspective view ofthe unitary frame member.

Fig. 4 is a fragmentary vertical sectional view showingthe unitary frame member formed to receive a screw means in rigid relationship.

Fig. 5 shows the frame member illustrated in Fig. 4 associated in means.

' Fig. 6 is a fragmentary view in vertical section showing the elements of a modied bracket.

Like parts are designated by the same reference characters throughout the several views.

Fig. 1 illustrates a bracket comprising as a insulator [made preferably of porcelain and having a transverse aperture 2 adapted to receive an electrical conductor (not shown). The insulator is also provided with a smaller transverse aperture 3 disposed at right angles to .the aperture-2 and spaced therefrom toward the upper end of the insulator. A channel 4 formed in the insulator l extends from one end of the aperturJ, across the lower end of the insulator and to the other end of the aperture 3 at the opposite side of the insulator. That portion of the channel I extending across the lower end of the insulator I provides arcuate leg portions 5 on. the insulator. These legs are bounded at the upper ends vthereof by shoulders 8 6..

The bracket further comprises as a part of its structure a unitary frame member designated generally -by the numeral 1 and -shown separately in Fig. 3. The frame member 1 comprises a base 8 which is formed upwardly -at its periphery into a cylindrical wall portion 9 and deformed centrally oi' the base into a raised portion I0 which is provided centrally thereof with a square-like opening Il. A pair of arm portions vi2--l2 ex- 9 in diametrically base I. Apertures diametrically aligned relative' to each are provided adjacent the upper ends of the arm portions i2-i2.

I'he screw means ISA comprises a threaded portion Il, a circular head I5 and a squared shank portion 'i6 adjacent th'e head i 5. It may be noted that adjacent the squared portion il rigid relationship with a screw4 screw there is-an unthreaded-sectio'n NA.

This unthreaded section occurs at this point because it is expensive and in most cases impractical to provide threads ush with the head of the screw.

The screw means I3A and frame member 'I are assembled by inserting the screw means into the opening II so that the squared shank portion I6 comes into registry with the squared opening II.

It may be noted that the assembled parts of the unit are heldin nonrigid relationship to each other due to thedimensional diierences of the opening II and the shank portion I6, thereby permitting a limited pivotal movement of the screw in the squared opening.

The assembled unit is mounted on the insulator I by engaging the arms grooves 4 4 and bringing the upper end of the cylindrical wall 9 into abutting relationship with the shoulders 6-6 and the apertures I3--I3 into axial registry with the aperture 3. The frame member is secured in reinforcing relationship with the insulator I by means of a rivet I1 extending through the aperture 3 and-headed at I8 to complete the assembly of the bracket.

It is to be noted that when the bracket is 'mounted on the side of a house, a portion of which is shown by the clapboard 8A, and the screw IBA extends between the studdings not shown, the only support for the bracket is the comparatively thin clapboard 8A. Accordingly it is desirable to provide threads adjacent the base portion in order to secure the bracket tightly against the clapboard 8A and prevent splitting thereof which generally occurs in cases where the unthreaded portion ISA is disposed adjacent the base.

I2-I2 with the side It is to be further noted that when the bracket is mounted in any suitable support, as for example the clapboard BA and an electrical conductor not shown connected thereto, relative movement between the insulator I and the frame member I is prevented by the interlocking relationship of the arms I2--I2 in the grooves li-Il and the engagement of the legs 5 with the wall portion 9. It is to be still further noted that the clearance between the top of the head I5 and the bottom vof the groove #l permits a limited pivotal movement of the screw ISA, allowing the screw to be extended in angularfrelationship to the base 8; thereby allowing the base 8 to make rm, at contact'with the supporting surface 8A into which the bracket is mounted even though the screw I3A enters the support at an undesirable angle.

as shown in Fig. 5. Thelanchor portions 2l provide additional anchorage between the screw ISA and the frame 1.

The rigidly assembled screw I3A and frame member 'I are mounted relativeto the insulator I in the manner heretofore described with reference to Fig. 1.

It may now be noted that a simple, improved method of assembly is provided for assembling the reinforcing frame member 1 of the insulator bracket with the screw means ISA and the insulator I using a minimum number of operations. It is further noted that an improved method of assembly is provided for assembling the screw means I3A in either an adjustable or rigid relationship with the frame member 1.

Fig. 6 shows a mddiiled Abracket comprising an insulator 22 similar tothe insulator described with reference to Fig. 1, butprovided with side grooves 23 and a recessed portion 24. A reduced v portion 25 extends below the larger upper section of the insulator forming shoulders at 26.

The frame member 2l comprises a base 28 provided centrally thereof with a squared opening 29 and a wall portion 30 which extends upward ly into arms 3| in the manner described with reference to Fig. 3.

The screw ISA maybe mounted in adjustable relationship with the frame member 2l and the assembled unit mounted on the insulator 22 in the manner described with reference to Fig. l, except that lthe head I5 is received in the recessed portion Zl and the reduced portion 25 is received within the wall portion 30 of the base 28.

The insulator 22 is held in rigid relationship to the frame member 21 in the manner described with reference to Fig. 1.

If it is desired to provide a rigid relationship between the screw I3A and the frame 2l, the opening 29 is undersize relative to the shank I6 and the parts are assembled as described with reference to Figs. and 5.

From the foregoing description itis obvious that the objects of this invention'have been attained by providing for an insulator screw bracket a unitary frame member which is associated in l interlocked reinforcing `relationship with the,in

It is further noted that the groove i cooperates f with thel head I5 to hold the screw 13A- in the opening II.

Figs. 4 and'5 illustrate the manner of assembly of the screw I3A in rigid relationship with the frame member l. The base ll of the frame member is i'lrst formed as shown in Fig.5 having an opening I9 which is undersize relative to' the dimension of the shank portion I6 of the screw. Therefore the base IB is embossed or upset as shown inFig. 4, to increase the distance between the opposed'sides of the opening I9 sumciently to freely receive theshank `I 6 of the screw. During this embossing operation the corners of the opening I9 are separately slightly as shown at After thescrew ISA has been inserted in the upset aperture I9 a convenient means is employed to press against the screw head I5 forcing the sides of the opening I9 into gripping relationship with the shank I 6 and at the same time upset the corners of the shank I6 into anchor portions 2l sulator and which is adapted to be assembled with a screw means in an adjustable or rigid relation- Y ship by a simple, effective and eicient method of reinforcing frame comprising a substantiallynonyielding cup-like base rigidly embracing said one end and a pair of arms integral with the base disposed in said grooves, means in said aperture securing said arms in said grooves, said base having a portion spaced from said one end providing a central inwardly dished portion on said base with a centrally disposed polygonal aperture in said dished portion, and a screw having an unthreaded portion of. its shank complementary to Vto said polygonal aperture and having a head die posed between said base and saidone end of said insulator, the unthreaded portion of thescrew shank being disposed in the inwardly dished portion of said base when the insulator is screwed home.

2. A bracket comprising an insulator having a transverse aperture and diametrically disposed groovesextending from said aperture to one end of said insulator, 1n combination with a unitary reinforcing frame comprising a substantially nonyielding cup-like base rigidly embracing said one end and a pair of arms integral with the base disposed in said grooves, means in said aperture securing said' arms in said grooves, said base having a portion spaced from said one end providing a central inwardly dished portion on said base with a centrally disposed polygonal aperture in said dished portion, and a screw having an unthreaded portion of its shank complementary to said polygonal aperture and having a head disposed between said base and said one end of said insulator, the unthreaded portion of the screw shank being disposed in said inwardly dished portion of said base when the insulator is screwed home, the space between said base and said one end being greater than the depth of said head, whereby stresses produced in said screw will be transmitted to said insulator solely through said frame.

CLARENCE J. LEMONT. 

